ALG II NEED HELP QUICK! Will mark the brainliest answer

What is the missing constant term in the perfect square that starts with x^2 -20x

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?